mirror of
https://github.com/0intro/conterm
synced 2024-11-25 23:19:36 +03:00
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#include "os.h"
|
|
#include <libsec.h>
|
|
|
|
/* rfc2104 */
|
|
static DigestState*
|
|
hmac_x(uchar *p, ulong len, uchar *key, ulong klen, uchar *digest, DigestState *s,
|
|
DigestState*(*x)(uchar*, ulong, uchar*, DigestState*), int xlen)
|
|
{
|
|
int i;
|
|
uchar pad[65], innerdigest[256];
|
|
|
|
if(xlen > sizeof(innerdigest))
|
|
return nil;
|
|
|
|
if(klen>64)
|
|
return nil;
|
|
|
|
/* first time through */
|
|
if(s == nil){
|
|
for(i=0; i<64; i++)
|
|
pad[i] = 0x36;
|
|
pad[64] = 0;
|
|
for(i=0; i<klen; i++)
|
|
pad[i] ^= key[i];
|
|
s = (*x)(pad, 64, nil, nil);
|
|
if(s == nil)
|
|
return nil;
|
|
}
|
|
|
|
s = (*x)(p, len, nil, s);
|
|
if(digest == nil)
|
|
return s;
|
|
|
|
/* last time through */
|
|
for(i=0; i<64; i++)
|
|
pad[i] = 0x5c;
|
|
pad[64] = 0;
|
|
for(i=0; i<klen; i++)
|
|
pad[i] ^= key[i];
|
|
(*x)(nil, 0, innerdigest, s);
|
|
s = (*x)(pad, 64, nil, nil);
|
|
(*x)(innerdigest, xlen, digest, s);
|
|
return nil;
|
|
}
|
|
|
|
DigestState*
|
|
hmac_sha1(uchar *p, ulong len, uchar *key, ulong klen, uchar *digest, DigestState *s)
|
|
{
|
|
return hmac_x(p, len, key, klen, digest, s, sha1, SHA1dlen);
|
|
}
|
|
|
|
DigestState*
|
|
hmac_md5(uchar *p, ulong len, uchar *key, ulong klen, uchar *digest, DigestState *s)
|
|
{
|
|
return hmac_x(p, len, key, klen, digest, s, md5, MD5dlen);
|
|
}
|